<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
         class Person{
             sayAge(){
                 console.log(18)
             }
             static sayName(){
                 this.sayAge()
                 console.log("hello")
             }
         }   
         var p=new Person();
         Person.sayName()
    </script>
</body>
</html>